Gas-engine.



No. 718,658. PATENTED JAN. 20, 1903. P. ROBERTSON & o. MATSON.

GAS ENGINE.

APPLICATION FILED JULY 29, 1901.

H0 MODEL.

2 SHEETS-SHEET 1.

No. 718,658. PATENTED JAN. 20, 1903. P. ROBERTSON & G. MATSUN. I

GAS ENGINE.

APPHLIOATIOH rum) JULY 39,1901. v I I0 IODEL. 2 SHEETH-8HEET 2.

N xx 1 l\ 'l N i 4 F x l E 1 a N 5 Q! I v I x H k H L IQ UNITED STATES PATENT ()EFICE.

PETER ROBERTSON AND CHRIST -MATSON, OF RACINE, WISCONSIN.

GAS-ENGINE.

SPECIFICATION forming part of Letters Patent No. 718,658, dated January 20, 1903. Application filed July 29, 1901- Serial No. 70.064. (No model.)

To all whom it ntay concern:

Be it known that we, PETER ROBERTSON and CHRIST MATSON, citizens of the United States, and residents of Racine, in the county of Racine and State of Wisconsin, have invented certain new and useful Improvements in Gas- Engines; and we do hereby declare that the following is a full, clear, and exact description thereof.

Our invention has for its object to automatically regulate feed of gasolene-vapor and air to an engine in proportion to the running speed of same, said invention consisting in certain peculiarities of construction and combination of parts hereinafter particularly set forth with reference to the accompanying drawings and subsequently claimed.

Figure 1 of the drawings represents a partlysectional side elevation of a portion of a gasolene-engine embodying our improvements; Fig. 2, a horizontal sectional view illustrating valve-controlling mechanism of the engine; Fig. 3, a detail partly-sectional view indicated by line 3 3 in the fourth figure; Fig. 4, a detail sectional view indicated by line 4 4 in the third figure; Fig. 5, a detail plan view, partly in horizontal section, illustrating a different position of the parts shown in said fourth figure, the view being indicated by line 5 5 in the third figure; and Fig. 6, a detail perspective view of a guide-block constituting a part of the valve-controlling mechanism.

Referring by letter to the drawings, A indicates the frame, B the cylinder, 0 the main or crank shaft, and D the belt-pulley, of a gasolene-engine. A pinion E, fast on the main shaft, meshes with a spur-wheel F, fast on a counter-shaft G, and by means of a key 12 a boss 0 of a flanged guide-block H is rigidly connected to the counter-shaft.

An eccentric I is provided with a central slot d, engaged by the guide-block, and a rod J, in union with eccentric ring K, has connection with cranks e of hollow rotatory valves L in chests M, with which the engine-cylinder is provided. Each valve is provided with inlet-ports f g, registrable with gasolene-vapor and air pipes N 0, connected to the valve-chest, an outlet-port h, with which each valve is also provided, being registrable with deemed necessary to illustrate a feature so common in the art.

Loose on counter-shaft G, between eccentric I and a collar j, is a sleeve P, having opposite curved slots 75 longitudinally thereof, and an arm Q of the sleeve is provided with a cam-slot m, engaged by a stud n of said eccentric. Oounter-shaft G is longitudinally bored, and that portion thereof within sleeve P is provided with diametrically opposite slots 19, intercepting the bore. The countershaft slots are engaged by a cross-head R at one end of a rod S, that has play in the shaftbore, and antifriction-rollers g on studs 0" of the cross-head engage the curved slots of the aforesaid sleeve.

In loose spanner connection with an annularly-grooved collar S, fast on the outer end of rod S, is a lever T in pivotal'connection with an arm t of the engine-frame, the central portion of this lever being shown in the form of a yoke T, engaged by diametrically opposite trunnions u, radiating from a slidecollar U on. the crank-shaft of the engine. Lugs '0 of the slide-collar are connected by links to with other lugs m of blocks V, loose on spokes y of a fly-wheel W, fast on main shaft 0 of the engine, and spiral springs X are arranged between the loose blocks and fiy-wheel rim.

Slide-collar U and spring-opposed loose blocks V in link connection therewith constitute a governor mechanism, the blocks being moved in one direction by centrifugal force against resistance of the springs and returned by expansive force of said springs.

Lever T is actuated by movement of slidecollar U in connection therewith to work rod S, and thereby turn sleeve P on counter-shaft G, owing to the cross-head R of the rod being in engagement with the curved slots of said sleeve, the result being automatic adjustment of eccentric I on guide-block H, because of the engagement of eccentric-stud n with camslot m of arm Q, extending from said sleeve. Eccentric I is normally in position to cause full opening of valves L when the engine is started and running slow; but as the rate of motion increases the governor mechanism operates to automatically adjust said eccentric, and thereby regulate the movement of said valves to vary shift of same at recurrent intervals, there being absolute cut-off when the aforesaid eccentric is moved on its guide H into concentricity with the counter-shaft G, above specified.

The valves L being each provided with three ports, arranged as above specified, the percentage of gasolene-vapor and air fed to the engine is the same in any quantity of the mixture, the vapor-inlet portsfbeiug of less area than the air-inlet ports g, and said valves may be either cylindrical or conical, as found most desirable.

Having thus described our invention, what We claim as new, and desire to secure by Letters Patent, is

1. In a gas-engine, a main shaft, a longitudinally bored and slotted countershaft in gear with the main shaft, a guide fast on the counter-shaft, a valve-controlling eccentric movable on the guide and provided with a stud, a sleeve loose on said counter-shaft and having curved slots longitudinally thereof, a cam-arm of the sleeve operative in conjunction with the eccentric-stud, a rod guided in the aforesaid counter-shaft and provided with a head extending through the slotted portion of same into the sleeve-slots, a rod-actuating lever in connection with the engine-frame, and lever-controlling governor mechanism.

2. In a gas-engine, a main shaft, a longitudinally bored and slotted counter-shaft in gear with the main shaft, a guide fast on the counter-shaft, a valve-controlling eccentric movable on the guide and provided with a stud, a sleeve loose on said counter-shaft and having curved slots longitudinally thereof, a cam-arm of the sleeve operative in conjunction with the eccentric-stud, a rod guided in the aforesaid counter-shaft and provided with a head extending through the slotted portion of same into the sleeve-slots, a rod-actuating lever in connection with the engine-frame, a slide-collar on said main shaft in trunnion connection with the lever, a flywheel, blocks loose on fly-wheel spokes, springs arranged to resist centrifugal force exerted on the blocks, and links connecting said slide-collar and blocks.

In testimony that we claim the foregoing we have hereunto set our hands, at Racine, in the county of Racine and State of Wisconsin, in the presence of two witnesses.

PETER ROBERTSON. CHRIST MATSON. Witnesses:

J. P. PETEREN, JACOB ANDERSON. 

